Abstract
. The development of mixed emulsion-based
films formed by sodium alginate/gelatin
incorporated with canola oil can offer particu
lar properties such as water vapor barrier
properties. The different ratios of sodium alginate/gelatin and sodium alginate/gelatin emulsion-
based films incorporated with canola oil were developed and their effects on films’ physical,
mechanical and barrier properties were assessed.
Here we set out to examine whether canola oil
addition and different ratio of sodium alginate/g
elatin modified physical, mechanical, and barrier
properties of films. To do so, the films were prepared by vary the ratio of sodium alginate/gelatin
(2.5, 1, 0.5). Canola oil addition induced changes
in moisture content, thickness, solubility, water
vapor transmission rate (WVTR), percent elongation
at break (p<0.05). In addition, it is apparent
that varying ratio of sodium alginate to gelatin
induced change the mechanical properties of
films. The reduction of sodium alginate to gelatin
decreased the tensile strength of both films.
Improved values of WVTR, tensile strength an
d solubility at break were observed when the
ratio of sodium alginate/gelatin emulsion film in
corporated with canola oil was 2.5. Therefore,
different ratio of sodium alginate/gelatin inco
rporated with canola oil can be used to tailor
emulsion films with enhanced water vapor barrier and mechanical properties